Too soon (5)
I believe the answer is:
early
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">too soon</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that too soon can be written as early)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for early that I've seen before include "Before the expected time" , "in the morning?" , "Gothic style following 13" , "Ahead of schedule" , "New-season" .)